As best as we can figure out, Meihui doesn't actually seem to have ever actually appeared in a comic. She was a character added retroactively to explain why the classic character Doctor Thirteen now had a teenage daughter. Even these pictures are actually of Traci from a notably weird collection of backup stories from Tales of the Unexpected called Doctor 13: Architecture & Morality. Her design there is cute, but it's not quite in keeping with her depiction elsewhere; so it actually works pretty well to help conceptualize what Mei probably looked like while adventuring with her husband.

We included her specificially because her role within the tapestry of magical characters at her particular point in history makes her a prime candidate to be included in the 4th Shadowpact, which also ties to her tragic death very well. It's a bit of a no-brainier, actually.